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selenium vs krypton vs bromine

Input interpretation

selenium (chemical element) | krypton (chemical element) | bromine (chemical element)
selenium (chemical element) | krypton (chemical element) | bromine (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| selenium | krypton | bromine atomic symbol | Se | Kr | Br atomic number | 34 | 36 | 35 short electronic configuration | [Ar]4s^23d^104p^4 | [Ar]4s^23d^104p^6 | [Ar]4s^23d^104p^5 Aufbau diagram | 4p 3d 4s | 4p 3d 4s | 4p 3d 4s block | p | p | p group | 16 | 18 | 17 period | 4 | 4 | 4 atomic mass | 78.971 u | 83.798 u | 79.904 u half-life | (stable) | (stable) | (stable)
| selenium | krypton | bromine atomic symbol | Se | Kr | Br atomic number | 34 | 36 | 35 short electronic configuration | [Ar]4s^23d^104p^4 | [Ar]4s^23d^104p^6 | [Ar]4s^23d^104p^5 Aufbau diagram | 4p 3d 4s | 4p 3d 4s | 4p 3d 4s block | p | p | p group | 16 | 18 | 17 period | 4 | 4 | 4 atomic mass | 78.971 u | 83.798 u | 79.904 u half-life | (stable) | (stable) | (stable)

Thermodynamic properties

| selenium | krypton | bromine phase at STP | solid | gas | liquid melting point | 221 °C | -157.36 °C | -7.3 °C boiling point | 685 °C | -153.22 °C | 59 °C critical temperature | 1766 K | 209.41 K | 588 K critical pressure | 27.2 MPa | 5.5 MPa | 10.34 MPa molar heat of fusion | 5.4 kJ/mol | 1.64 kJ/mol | 5.8 kJ/mol molar heat of vaporization | 26 kJ/mol | 9.02 kJ/mol | 14.8 kJ/mol specific heat at STP | 321.2 J/(kg K) | 248.05 J/(kg K) | 947.3 J/(kg K) adiabatic index | | 5/3 | (properties at standard conditions)
| selenium | krypton | bromine phase at STP | solid | gas | liquid melting point | 221 °C | -157.36 °C | -7.3 °C boiling point | 685 °C | -153.22 °C | 59 °C critical temperature | 1766 K | 209.41 K | 588 K critical pressure | 27.2 MPa | 5.5 MPa | 10.34 MPa molar heat of fusion | 5.4 kJ/mol | 1.64 kJ/mol | 5.8 kJ/mol molar heat of vaporization | 26 kJ/mol | 9.02 kJ/mol | 14.8 kJ/mol specific heat at STP | 321.2 J/(kg K) | 248.05 J/(kg K) | 947.3 J/(kg K) adiabatic index | | 5/3 | (properties at standard conditions)

Material properties

| selenium | krypton | bromine density | 4.819 g/cm^3 | 0.00375 g/cm^3 | 3.12 g/cm^3 liquid density | 3.99 g/cm^3 | | 3.12 g/cm^3 molar volume | 16.39 cm^3/mol | 22300 cm^3/mol | 25.61 cm^3/mol Mohs hardness | 2 (≈ gypsum) | | Brinell hardness | 736 MPa | | bulk modulus | 8.3 GPa | | 1.9 GPa shear modulus | 3.7 GPa | | Young's modulus | 10 GPa | | Poisson ratio | 0.33 | | refractive index | 1.000895 | 1.000427 | 1.001132 sound speed | 3350 m/s | 1120 m/s | thermal conductivity | 0.52 W/(m K) | 0.00943 W/(m K) | 0.12 W/(m K) (properties at standard conditions)
| selenium | krypton | bromine density | 4.819 g/cm^3 | 0.00375 g/cm^3 | 3.12 g/cm^3 liquid density | 3.99 g/cm^3 | | 3.12 g/cm^3 molar volume | 16.39 cm^3/mol | 22300 cm^3/mol | 25.61 cm^3/mol Mohs hardness | 2 (≈ gypsum) | | Brinell hardness | 736 MPa | | bulk modulus | 8.3 GPa | | 1.9 GPa shear modulus | 3.7 GPa | | Young's modulus | 10 GPa | | Poisson ratio | 0.33 | | refractive index | 1.000895 | 1.000427 | 1.001132 sound speed | 3350 m/s | 1120 m/s | thermal conductivity | 0.52 W/(m K) | 0.00943 W/(m K) | 0.12 W/(m K) (properties at standard conditions)

Electromagnetic properties

| selenium | krypton | bromine electrical type | | | insulator resistivity | | | 1×10^10 Ω m (ohm meters) electrical conductivity | | | 1×10^-10 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic | diamagnetic volume magnetic susceptibility | -1.93×10^-5 | -1.65×10^-8 | -1.53×10^-5 mass magnetic susceptibility | -4×10^-9 m^3/kg (cubic meters per kilogram) | -4.4×10^-9 m^3/kg (cubic meters per kilogram) | -4.9×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -3.16×10^-10 m^3/mol (cubic meters per mole) | -3.69×10^-10 m^3/mol (cubic meters per mole) | -7.83×10^-10 m^3/mol (cubic meters per mole) work function | 5.9 eV (Polycrystalline) | | threshold frequency | 1.427×10^15 Hz (hertz) | | color | (gray) | (colorless) | (red) refractive index | 1.000895 | 1.000427 | 1.001132
| selenium | krypton | bromine electrical type | | | insulator resistivity | | | 1×10^10 Ω m (ohm meters) electrical conductivity | | | 1×10^-10 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic | diamagnetic volume magnetic susceptibility | -1.93×10^-5 | -1.65×10^-8 | -1.53×10^-5 mass magnetic susceptibility | -4×10^-9 m^3/kg (cubic meters per kilogram) | -4.4×10^-9 m^3/kg (cubic meters per kilogram) | -4.9×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -3.16×10^-10 m^3/mol (cubic meters per mole) | -3.69×10^-10 m^3/mol (cubic meters per mole) | -7.83×10^-10 m^3/mol (cubic meters per mole) work function | 5.9 eV (Polycrystalline) | | threshold frequency | 1.427×10^15 Hz (hertz) | | color | (gray) | (colorless) | (red) refractive index | 1.000895 | 1.000427 | 1.001132

Reactivity

| selenium | krypton | bromine valence | 6 | 2 | 5 electronegativity | 2.55 | 3 | 2.96 electron affinity | 195 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) | 324.6 kJ/mol (kilojoules per mole) first ionization energy | 941 kJ/mol (kilojoules per mole) | 1350.8 kJ/mol (kilojoules per mole) | 1139.9 kJ/mol (kilojoules per mole) ionization energies | 941 kJ/mol | 2045 kJ/mol | 2973.7 kJ/mol | 4144 kJ/mol | 6590 kJ/mol | 7880 kJ/mol | 14990 kJ/mol | 1350.8 kJ/mol | 2350.4 kJ/mol | 3565 kJ/mol | 5070 kJ/mol | 6240 kJ/mol | 7570 kJ/mol | 10710 kJ/mol | 12138 kJ/mol | 22274 kJ/mol | 25880 kJ/mol | 29700 kJ/mol | 33800 kJ/mol | 37700 kJ/mol | 43100 kJ/mol | 47500 kJ/mol | 52200 kJ/mol | 57100 kJ/mol | 61800 kJ/mol | 75800 kJ/mol | 80400 kJ/mol | 85300 kJ/mol | 1139.9 kJ/mol | 2103 kJ/mol | 3470 kJ/mol | 4560 kJ/mol | 5760 kJ/mol | 8550 kJ/mol | 9940 kJ/mol | 18600 kJ/mol
| selenium | krypton | bromine valence | 6 | 2 | 5 electronegativity | 2.55 | 3 | 2.96 electron affinity | 195 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) | 324.6 kJ/mol (kilojoules per mole) first ionization energy | 941 kJ/mol (kilojoules per mole) | 1350.8 kJ/mol (kilojoules per mole) | 1139.9 kJ/mol (kilojoules per mole) ionization energies | 941 kJ/mol | 2045 kJ/mol | 2973.7 kJ/mol | 4144 kJ/mol | 6590 kJ/mol | 7880 kJ/mol | 14990 kJ/mol | 1350.8 kJ/mol | 2350.4 kJ/mol | 3565 kJ/mol | 5070 kJ/mol | 6240 kJ/mol | 7570 kJ/mol | 10710 kJ/mol | 12138 kJ/mol | 22274 kJ/mol | 25880 kJ/mol | 29700 kJ/mol | 33800 kJ/mol | 37700 kJ/mol | 43100 kJ/mol | 47500 kJ/mol | 52200 kJ/mol | 57100 kJ/mol | 61800 kJ/mol | 75800 kJ/mol | 80400 kJ/mol | 85300 kJ/mol | 1139.9 kJ/mol | 2103 kJ/mol | 3470 kJ/mol | 4560 kJ/mol | 5760 kJ/mol | 8550 kJ/mol | 9940 kJ/mol | 18600 kJ/mol
Reactivity
Reactivity

Atomic properties

| selenium | krypton | bromine term symbol | ^3P_2 | ^1S_0 | ^2P_(3/2) atomic radius | 115 pm | 88 pm | 115 pm covalent radius | 120 pm | 116 pm | 120 pm van der Waals radius | 190 pm | 202 pm | 185 pm (electronic ground state properties)
| selenium | krypton | bromine term symbol | ^3P_2 | ^1S_0 | ^2P_(3/2) atomic radius | 115 pm | 88 pm | 115 pm covalent radius | 120 pm | 116 pm | 120 pm van der Waals radius | 190 pm | 202 pm | 185 pm (electronic ground state properties)

Abundances

| selenium | krypton | bromine universe abundance | 3×10^-6 mass% | 4×10^-6 mass% | 7×10^-7 mass% meteorite abundance | 0.0013 mass% | | 1.2×10^-4 mass% crust abundance | 5×10^-6 mass% | 1.5×10^-8 mass% | 3×10^-4 mass% ocean abundance | 4.5×10^-8 mass% | 2.1×10^-8 mass% | 0.0067 mass% human abundance | 5×10^-6 mass% | | 2.9×10^-4 mass% universe molar abundance | 5×10^-8 mol% | 6×10^-8 mol% | 1×10^-8 mol% meteorite molar abundance | 2.9×10^-4 mol% | | 2.3×10^-5 mol% ocean molar abundance | 3.5×10^-9 mol% | 1.6×10^-9 mol% | 5.2×10^-4 mol% crust molar abundance | 9.9×10^-7 mol% | 4×10^-9 mol% | 7.8×10^-5 mol% human molar abundance | 4×10^-7 mol% | | 2.3×10^-5 mol%
| selenium | krypton | bromine universe abundance | 3×10^-6 mass% | 4×10^-6 mass% | 7×10^-7 mass% meteorite abundance | 0.0013 mass% | | 1.2×10^-4 mass% crust abundance | 5×10^-6 mass% | 1.5×10^-8 mass% | 3×10^-4 mass% ocean abundance | 4.5×10^-8 mass% | 2.1×10^-8 mass% | 0.0067 mass% human abundance | 5×10^-6 mass% | | 2.9×10^-4 mass% universe molar abundance | 5×10^-8 mol% | 6×10^-8 mol% | 1×10^-8 mol% meteorite molar abundance | 2.9×10^-4 mol% | | 2.3×10^-5 mol% ocean molar abundance | 3.5×10^-9 mol% | 1.6×10^-9 mol% | 5.2×10^-4 mol% crust molar abundance | 9.9×10^-7 mol% | 4×10^-9 mol% | 7.8×10^-5 mol% human molar abundance | 4×10^-7 mol% | | 2.3×10^-5 mol%

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